Designed as a better-performing, more reliable replacement for the UH-1 Huey, the UH-60 Black Hawk was first flown on November 29, 1974. The Black Hawk was one of the first aircraft to use the General Electric T700, a common turbine engine designed for use in multiple Army helicopters. This four-bladed, twin-engined, medium-lift aircraft has a low-profile shape so that it can be transported aboard the C-130 Hercules. It also has greater survivability than the helicopter it replaced, with advanced avionics and electronics such as the Global Positioning System (GPS). The Black Hawk also serves as Marine One when transporting the President of the United States.